Gage.



No. 804,067. PATENTED NOV. '7, 1905.

GAGE.

APPLIGATIoN FILED JAN. 1a, 1905.

Witwe/oom v Gttozwms.

UN ITED STATES PATENT SFFIQE.

GAGE.

Specification of Letters Patent.

Patented Nov. 7, 1905.

Application filed January 18, 1905. Serial No. 241,677.

T0 all whom, it may concern:

Beit known that I, HARRY'W. S'roWE, aeitizen of the United States,residing at Fitchburg, in the county of Worcester and State ofMassachusetts, have invented new and useful Improvements in Gages, ofwhich the following is a specification.

My invention pertains to improvements in gages, particularly formachinists7 use.

It has for its object more especially to provide for gaging or testingthe accuracy of the effective or forming edges or faces ofthreadproducing tools as well as that of the produced thread and tocarry out these ends in a simple and eective manner.

Said invention consists of certain structural details substantially ashereinafter fully disclosed, and particularly pointed out by the claim.l A

In the accompanying drawings, illustrating the preferred embodiment ofmy invention, Figure l is a perspective View of said invention or gage.Fig. 2 is a transverse section thereof. Fig. 3 is a view of my gage insuspended position upon an improvised supportas, for instance, alathe-center held between the chucks-and showing the practicalapplication of the same for use in connection with thread forming orproducing tools. Fig. 4 is a view showing the application of the gage toa produced screw-thread.

In the disclosure of my invention I form the same from hardenedtool-steel, also ground and preferably magnetized, it consisting `of abase l, having formed or erected thereupon.

at the point of convergence or apex of itsdivergent or V portion,presently described, a number of peculiarly-shaped members 2, 3, and 4of the cross-sectional dimension of what may be considered a plate,further described presently. Said base member lis produced, preferably,in practically inverted V shape form,which being,'as above noted,magnetized and having its divergent longitudinal edges presented to asteel piece 1X, suitably secured in place, servesto permit the readysuspension of the same in position for use, as noted especially in Fig3. This construction of suspending-base provides for its application tothe support regardless of Whether the latter be cylindric or angular, asis apparent. The members Q and 3, having a V-shaped notch 2 producedtherebetween, and the member 3, provided with a like notch 3, butconsiderably less depth than the aforesaid notch, are thus adapted oreffective for testing the accuracy of the forming edges of what may be alathe-center and a diamond-pointed tool for cutting a V-thread, asdisclosed by Fig. 3. The outer edge of the member 2 being oblique orinclined and the opposite edge thereof reversel y inclined and theinclinations thereof meeting, said member has therefore a taperingoutline which, however, is only incidental, said outer inclined edge ofsaid inember serving as a gage for right-lined basetools for truingcenters, as also noted from the same ligure.

Intermediately of the members 3 and 4 is provided a rectangular recessor notch a, Whose walls and base-surface form true planes, are effectivefor ascertaining the accuracy of the impingin g edges of external squarethreadforming tools and internal corresponding thread-forming tools, aswill be observed also from Fig. 3.

The member 4 hasV penetrating its outer edges, one at right angles tothe other, V- shaped notches 4J 4b, adapted as gages for determining theeffective qualities of external and internal V-shaped thread-cuttingtools, as also seen in the latter ligure.

As seen in Fig. 4, this device is also readily applied for gaging theproduced screw-thread itself, both internal and external.

Latitude is allowed as to details herein,since they may be changed ascircumstances suggest without departing from the spirit of my invention.

A gage of the character described, comprising a V shaped base portioneffective for spanning a segment of a suitably-supported piece and forattachment thereto, and rightlined gage members integral with the apexof said V-shaped portion and in a line passing through the latterportion, equidistantly of the arms of said base portion.

In testimony whereof I afx my signature in presence of two subscribingWitnesses.

HARRY W. STOWE.

Witnesses:

` PETER F. WARD,

ANDREW COMURY.

